Time Travel

What are the possibilities of time travel?

I think we will find there are sadly no possibilities of time travel,
because while many people have assumed a thing called time exists, and
written about ‘it’ as if it exists, no one seems to have actually
bothered to produce an experiment as per the scientific method to
confirm their theory.

Firstly,
I fyou ask "is time travel possible" on public forums, or of most experts on "time" you will typically get many answers repeating the assumption that
Einstein’s Relativity in some way proves time, and suggests time ( as
opposed to just space , an rates of change) can be manipulated.

Anyone
who refers you to this paper suggesting it provides evidence time may
exists (let alone be manipulated )should be able to show you why this is
true in the opening section of the paper section 1 of the paper..."Kinematics".But
if you ask any responders here on Quora, I think you may find they have
either not read the source paper for themselves, or cannot show where
it proves, rather than just assumes ‘time’

Specifically...

In section 1 of the paper..."Kinematics" , the (translated) words are...

"If we wish to describe the motion of a material point, we give the values of its co-ordinates as functions of the time.

Now
we must bear carefully in mind that a mathematical description of this
kind has no physical meaning unless we are quite clear as to what we
understand by “time.” "

“The pointing of the small hand of my watch to 7 and the arrival of the train are simultaneous events.”

So, it is stated.... “If we wish to describe the motion of amaterial point, we give the values of its co-ordinates as functions of the time.“

But in fact, the paper only describes the motion of one material “point”, (a train), to the motion of another “material point”, the motion of the tip of a motorised hand rotating on a numbered dial.

In
other words, while many people assume relativity proves time exists...
section 1 of the seminal paper on Relativity itself only “assumes” that
there is a thing called “time”, thus implying its existence, and
“passing” are valid terms, and that a rotating hand on a numbered dial,
in some way shows, or proves this. But from the outset the paper
provides no logic or proof of the existence or function of “time”.

and,
just "calling" the movement of a rotating hand "time", and from that
suggesting there "is a thing called time that is needed for things to be
able to move" - is imo, the most horrendously weak reasoning.

However,
relativity does show how moving things "are" "changing" more slowly,
but it does not prove there is a future or a past, or a thing called
time that is "passing" more slowly... though many people seem to assume
otherwise.

For example if you look at a trpical answer on Quora.

Travelling
into The future is possible and theoretically provable. If you moved at
the speed of light than you could almost stop time and never age
compared to your slower earth counterparts

In fact
observation ( e.g. of the oscillators in GPS satellites ) all that is
observed is that a moving oscillator is oscillating ( changing) more
slowly than a stationary one.

And there is no proof at all that
it is “heading into a future”, or that “a future is arriving” as it or
you change at different rates ... here... ‘now’ so to speak.

(There
is a fair amount to understand, on many levels, to see how this
‘timeless’ pov may make sense, these are the more concise videos I’ve
put together so far on the possibility)

‘Time-Travel’In
my carefully researched opinion, time travel is completely moot,
because we have no valid reason, or proof of, the existence of a thing
called time.

For there to be any chance of time-travel, e.g.
from or to “the future”, you would first need some reason to suspect
that a thing or place called “the future” existed, and also some
experiment, as per the scientific method, to support your hypothesis.

Professor
Hawking’s idea of arranging a time travellers party, to see if people
might attened ‘from the future’, is rather unscientific because it is
pointless expecting people to come from somewhere,(‘the future’) if you
have not even established that that place exists.

A Simple experiment.

For
anyone to assume time exists, other than as a useful idea, they should
be able to disprove that matter just exists and moves and interacts, and
show instead that a thing called ‘time’, with a future and a past
really exist. But there seems no reason to genuinely suspect this, and
no proof of this – consider this simple experiment....

Wherever you are, sit and look around you, and ask yourself...

“do I see any evidence at all of a ‘future’ ‘arriving’ “?

To
clarify this question for yourself place any object on a surface and
push left to right wit your finger, and look very closely at the object,
and ask yourself...

“Do I see any evidence at all, whatsoever, that this object is in some way ‘heading into’ a ‘future’ as it moves”?

“Do I see any evidence at ll that a ‘future’ is ‘arriving’ as this object moves”?

“Do I see any evidence at all, that as this object moves, it in any way at all leave a ’temporal past’ behind it”?

... or are you just seeing your finger to the left of the object, pushing it to the right, where your finger touches it?

Instead of asking does time exist, or is time travel possible, it may be worth first asking

“If
everything in the universe JUST exists, moves, and interacts in all
directions, would that be enough to mislead me into assuming there is
also a ‘past’, and/ or ‘future”?

If you consider the above
question carefully you may find what it suggests very interesting, and
you may also realise that no other writer on ‘time’ seems to have
thought of, let alone considered and been able to disprove the
possibility it suggests.

So, for the
reasons above, and those in the more technical and detailed video below,
I would say sadly time travel is entirely moot.

Matthew Marsden

more general aspects of 'time'Does Time exist? How 'Time travel Paradoxes' can't happen without "the past".